Eternal Love (Chinese) - I know a lot of people like this, but the plot is waaay to complicated with too much CGI and angsty plot twists.
King of Baking, Kim Tak Goo (Korean) - this is completely based on my personal taste, I HATE love squares
Marriage, Not Dating (Korean) - same reason as above, I hate love triangles
The Girl Who Sees Scents (Korean) - dislike the male lead's personality he seems like he has a sister-complex, and the female lead loses her personality and motivation as the drama progresses. The plot is boring and cliche
The K2 (Korean) - watched only for Ji Chang Wook. The female lead is really weak and useless. romance is lackluster and a massive disappointment. Many people ship the female villain with the male lead rather than the female lead.
Yong Pal (Korean) - Promising in the beginning, but the second half was horrible. female lead turns into a villain. Male lead loses his personality and becomes someone the female lead can just order around.